Air pump



March 29,1927. 6

AIR PUMP Filed Jun; 13. 1925 Patented Mar. 29, 1927.

UNITED STATES HERMANN LE6, OF GEM-REUBS, GEBMAItY.

am ruur.

Application filed June 13, 1925. Serial 110. 88,817.

This invention relates to improvements in air pumps, and it is the principal object of the invention to provide an an pump for use in automobiles and garages adapted to be coupled with an electromotor by the intermediary of a fan providing for a continuous and uniform generation of a current of coolmg air.

Another object of the invention is the provision of such an air pump with a weighted fan adapted to carry the pump at all times over the dead point.

A further ob 'ect of the invention is the provision of a, one or two cylinder pump in which the motor shaft is guided into an oil containing chamber and has attached thereto a disc-with an eccentrically arranged pin or bolt thereon carrying a ball bearing, the ring of which carries an operating member.

A still further object of the invention is the provision of an oil chamber closed by a cover carrying the oil supply duct provided with a lurality of openings in. its upper part or head through which the air current generated b the fan enters the oil chamber.

It is furthermore also one of the objects of the invention to provide a pump equipped with a pipe-for guiding the exhaust air in a plurality of convolutions ast the fan into a pressure wind-chest for e ectively cooling said air.

These and other objects and advantages of my invention will become more fully apparent as the descri tion thereof proceeds, and will be specifical y defined in the appended claims.

In the accom anying drawing, forming a material art 0 this disclosure:

Fig. 1 1s a side elevation of an air pump constructed according to the present inven tion, particularly adapted for use as a garage pump.

Fig. 2 is an end view of a two cylinder pump constructed according to the present invention.

Fig. 3 is a side elevation of a one-cylinder pump for'use as anautomobile pump adapted to be installed into a car.

The air pump a is coupled with an electromotor I) by the intermediary of a ventilator or fan 0 having a weighted part (1 in order to'prevent the pump to come to a dead stop.

A casing 6 serves as a protecting cover for the fan 0.

. The shaft f ofthepump is coupled directly with the clcctromotor shaftand is A rotating disc I: is attached to the end of shaft f entering a chamber 11 of the pump casing. This disc is equipped with an cecentricall arranged pin or bolt Zcarr ing the ball caring m to which is engage an operating member n, and the bolt 0' on piston 0 is connecting said operating member .and piston by the movable engagement between the head 11. of the operating member n and said bolt 0'.

A cover 2" closes the oil containing chamber i and carries the oil supply ipe "t" and an oil gage r indicating the leve of the oil within chamber i. i

The oil supply pipe 2' has openin i in the upper part or head thereof $1 which t e air-current generated by the fan 0 is entering the chamber i in order to eifeetively cooling the same.

The air pump can be constructed as a one cylinder pump .as for instance illustrated in Figure 3, or as a multi-cylinder preferably two-cylinder pump as shown by way of example in Figure 2.

As one cylinder pump it is especially well ada ted for use on cars and can be convenough journaled in ball bearings g and h (Fig. 3). v

ient y installed in motor cars of any t pe in which case the motor I) and the w eeled base thereof may be dispensed with,'while the two c linder pump with the electro motor an the wheeled base is particularly well adapted for use in garages, etc.'

The air exhausted by the pump is guided through the duct p into the pressure windchest 9 which is equipped in the well known manner with a reducing safety valve and manometer.

In order to effect a positive cooling of the air exhausted by the pump under pressure, the'duct p is carried in a number of eonvolutions p within or into the fan cover e close to the fan 0 so that the air current generated by the fan will effectively cool the air in the duct. I

The entrance of dirt, dust, etc., into the pump cylinder is prevented by constructing the air exhaust valve as a cap representing the valve cone which is spring-controlled or 1 pressed while a nut is used to close the valve casing towards the outside.-

"An air pum constructed as described above will be a le to execute a very great number of revolutions owing to the peculiar arrangement of the operating member n on the piston o and the crank so that the pump appended claims will work at all times with the greatest possible efliciency.

The generated heat, and a heating of the parts in general, will 'be effectively avoided and prevented by the continuous and uni- 01111 generation of an air current by the anc.

It will be understood that I have illustrated and described one example of the many ways of constructin my ump and that the same may be su jecte changes such as fall within the scope of the without departure from the principle involved.

Having thus described my invention, what I claim as new and desire to'secure by Letters Patent is:

1. In a motor-operated air pump, a fan for coupling pump and motor, a weighted part on said fan for carrying it over the to many I dead center, an oil containing chamber into which one end of the pump shaft extends, a disc on said shaft within said chamber, an eccentricallyarranged bolt on said disc, a ball bearing on said bolt, an 9 rating mem er onsaid ball bearing, a hea on said operatin member, a pump c linder iston and a b0 t on said piston to w iich sai head is movably engaged, and a means for cooling the parts. a

2. In a ,motor-operated air pum a fan for coupling pump and motor s afts, a casingfor said fan, a duct for the exhaust gases guided into said casing in a plurality of convolutions, one for each pump cylinder, and a pressure win-d chest into which said Signed at Gera-Reuss,

Germany, this 17th day of May A. D. 1925.

HERMANN LEO.

duct is guided. 

